Improvement in the mode of



J. G. TIBBET'T. ANTIFRIGTI ON ROLLER.

Patented July 22 1839.

v the usual manner.

UNITED STATES PATENT OFFICE.

JOHN G. TIBBETS,-OF NEW YORK, N. Y.

IMPROVEMENT IN THE MO DE OF APPLYING ANTI-FRICTION ROLLERS AND BALLS TO THE AXLES AND BOXES 0F CARRIAGE-WHEELS. &c. I

- Specification forming part of Letters Patent No. 1,254, dated July 22, 1839.

To an whom it may concerm Be it known that I, JOHN G. TIBBETS, of the city, county, and State of New York,have invented a new and useful Mode of Applying Rollers Around Axles and Balls at the Ends and Shoulders Thereof for Reducing Friction,

--which '-is described asfollows, reference be-- inghad to the annexed drawings of the same, makingpart of this specification.

Of a hub, Figure 1 represents a horizontal 7, a nut; Fig. 8, a screw-cap to retain .the oil and keep out dust.

Of a segment-box and journal, Fig. 9 rep- -resents a vertical longitudinal section of box,

journal, rollers,'rings, and balls; Fig. '10, an end view of segment-box, axle, and rollers, the flanged ring being removed; Fig. 11, an end of the same, the flanged ring being in'its proper place. Fig. 12 represents a horizon.- tal section of the segment-box, axle,- rollers, rin gs, balls, &c. ,Fig. 13, a front view of flanged ring in segments; Fig. 14,3. section of the same.

First, of ihe'hub and axle-tree-The hub, axle-tree, spokes, andscrew-oap are made in box as greatly to reduce friction. The inside of the pipe-box B of the hub must be perfectly cylindrical and turned smooth,having dovetailed groovesg near each end inside. This box must be heated, so as to ex pand it sufliciently to admit dovetailed edges of rings B K at each end in a cold state,which the box closes upon as it contracts in cooling, and thus unites the box-and rings firmly together, and forms rims around the inside of the box to hold the rollers in theirpropor positions, and also forms concave shoulders to admit balls to reduce the friction at the ends of the box. The sides of these rings toward 'therollers are made flat and smooth. The

opposite sides are made concave to admit the balls, which are contained between said rings washer F.

aout dirt.

' out dirt.

The improvement .con'f sists in a certain arrangement of rollers, balls, rings, &c., around the. axle-tree inside the and the concarve shoulder L and concave slot The dovetail ring E has a male screw cut on its outside, on which is screwed the screw-cap H for holding oil and keeping The concave circular shoulderL is made beveling on the outside at I), over which the sand-ring of the hub projects for keeping or put on separately. The balls are madeof, iron or steel. ,The slot-washerF ismade concave on the side toward the rollers and fiat on the opposite side. Its use does away with the necessity of having right and left hand nuts, and enables the use of right-hand screwnuts altogether. The nuts G are made in the usual manner. The rollers D should be turned true, of the same diameter at each end, but smaller about one-third of the length at the middle to make roomfor oil, with which they and the balls, 620., should be kept well lubricated. The lengths of the rollers should be three times the diameterot' theaxle-tree. These rollers cannot be well applied to separate boxes in each end of the hub, but are particularlvapplicable to thebefore-described pipe-box.

Second, the segment-box cmdjournal.-Thi s box is made in two parts B B, each a semicircle, with fianges perforated by which'the parts are held firmly together by screw-bolts. Its diameter inside is as much greater than that of the axle to; turn therein as the s'pace.

required for the series of anti-friction rollers D, arranged around the axle. Near each end of the box inside is a groove to receive the flange f of aring E at each end, one side of which toward the rollers being fiat and the opposite or outside of the ring next the shoulder-ring being concave to admit a ball or balls between it and a concave shoulder-ring made similar to the shoulder-ring of the axletree before described, which shoulder-ring is secured by a key 7, passing through it and the axle. The rollers are made and arranged in a similar manner to those above described. X is an aperture or oil-hole throughthe box I to admit oil for lubricating the interior of the The slot-washer F is simply a ring made concave on the side toward the balls and fiat on the other side, as betoredescribed, having the opening in the center for the axle in the It is either welded to the axle-tree shape of a segment of a circle, and the part of said axle on which it is put of a corresponding shape, by which the washer is pre-- vented from tu rning and unscrewing the nuts.

I do not claim the employment of rollers and balls to avoid friction in machinery; but

'hat I do claim as my invention, and desire to secure by Letters Patent, is

The combination of the two sets of concave flanges L and K and E and F, with the balls D working between them to prevent the balls from rubbing against the axle and box, in the manner and for the pnr and also the reducing rollers at the middle as herein described.

of the diameter of the to form snace for oil,

NATHL. P. LABARTE, JOHN MoCHEsNY.

pose herein described, 

